Internal-combustion engine



Aug.. u i924,

E. R. EURTNETT INTERNAL coMBusTroN ENGINE Filed Feb. 23, 1922 3Sheets-Sheet 2 Aug. 5 XQZL LWUQ@ E. R. Hummm? INTERNAL COIVBUSTIONEINGEN Filed mb. 23g 1922 s Sheets-shew 5 i 35 charges to the combustiPinares Aug-5, 1924.

f UNITED STATES PATENT orricn.

at nUn'rNnrr, or nos ANGELES, CALIFORNIA, Assioma' or omi-.astri ToHoman s. BRUNELL. or Los momes, caLrronNIa.

- marinai-consumir ENGINE.

Application lecll February V T o all whom it may. concern.' Be it knownthat I, Event-:rr R. Bonr- Narr,l a citizen of 'the United States,residing :it Los Angeles, in -fhe .county of `Los Angeles and State fofQalifornia, have invented new Vand 'useful Improvements inInternal-Combustion Engines, of which the following isla specification.l

My invention relates V.to internal combustionengine'sz -and has for, itsprincipal "object the provision of a rela-tively sim le andcfncientengine having a iston va ve anda ported reciprocating'xnem r 'that arearranved foro ration in separate chambers immediately a jacenttothema-in piston or power chamber of the engine and whichreciprocating'rpiston and rted membercooperate in controlling .t e1"aulrniss'ion...l of gaseous fuel intol the combustion chamber of theengine' and `likewise'fccmtrolling the discharge' of burnt gases vandproducts of .combustion from said'combustion chamber.

Further objects of n iy` invention are to generally improveuponfandf-simplify the construction of thccxisting forin's of' similarAtypeslof engines, to provide a construction wherein the* swo'rkingkcylinder is` rovided with jagmain' i'ort'that performs t e func? tionsof an in et port and an'exhaust `port :miand said engine. having alseconda .on

auxiliary port that' constitutes'a com ined inletI and exhaust port;such construction providing dual'inlet andexha'ust openings,therebyinsuring the admission .of fuel Y chamber of the lengine and'likewise insuring the complete exhaust of all products of combustionfrom said .combustion chamber, to'provide, in an internal combustionengine, a' cylinder block 4o that is capable of'being easily andchoaplj7 produced and finished, to provide` for-tha ia fid vandeffective. radiation of heat .dei- 'lve oped'within the engine duringoperation, so as to remove the cause of warping@ d '45 blistering of.the piston head and the lWalls of the cylinder adjacent to the exhaustport. and, further, to provide an en 'ne that has' relatively few movingparts, .tilaieby minimizing noise. in joperation, and to provide 5o anvengine having-'great 4,e'izibility Vand a maximum'. ellicien'cy ap-*highvspeeds, and lwhich-,latter result ips-attained byprovidingample-openings,fortheascous fuel enter- -ng .the combustioncham r andthe prod- 28, 1922.V Seria! No. 588,754.

ucts of combustion discharging therefrom.

' With the foregoing and other objects in the engine and through theceriteiiof the' reciprocating selector and selector chamber. 1 'Fi 3 isa horizontal section taken approximately on the-line 3-'3 of Fig.2.

Fig, 4 is a horizontal section taken approximately on the line 4 4 ofFig. 2.

Fig. 5 is a transverse section taken vertically'through the piston valveand selector chambers, and said view bein taken approximately onthe'line 5-5 o Fig. 4.

ing drawings, which illustrate a practical embodiment of my invention,10 designates a crank case of suitable structure and pro- Referring bynumerals to the accompanyvided .with bearings'for a main crank shaft lland a vulve and selector-actuating crank shaft 12, the latter being d'venat half the speed of the cran'lc shaft by" 'suitable gearim.r 13that connects said crank shafts, and said gearing being enclosed in asuitable housing 14.1; v

Sui-mounting the crank. casa' 10 'is a cylinder' block 15 in which is`formed a' piston"j chamber 16, the upper portion 17 thereofconstitutingthe combustion cham- .,ber, and formed in the block', to4 one side oflandparallelwith said piston chamber 16` is a piston valve chamber 18andla recipro- --cating selector chamber 19.

' Thechambers 18 and 19 a a necessarily longer than the piston chamber16, and the upper portions of said longer chambers are enclosed bysuitable walls'l, which latter are continuations of block 15.

The wall of the block surrounding the :combustion chamber 17 .andsurrounding the intermediate portions 'of the chambers 18 and"l9. areprovided-with eonneeted chamlwi's 2() through which'a uidc'oling mediam'such as water .is adapted vttirculato 1 31, and formed in the wallbetween the seg 'I 1,504,096 X in order to disseminate the heatdeveloped in the combustion chamber of the engine during operation.

While I have shown my improved en 'ne as having/but a single cylinder,it wi be understood Athat the construction as illustrated and describedmay be incorporated in a niulti-cylinder'engine, in whichevent thecylinders are, preferably, 'cast en bloc.

Arranged for reciprocatory movement within the piston chamber 16, is apiston 21 of suitable structure, and, connecting the p y cant todischarge directly onto the wristpin to which the upper 'end of `rod 37is consame to the crank on shaft 11, is an ordinary connecting rod 22. Y

The upper end of the combustion chambei' 17 has communication with theintermediateportion of chamber 18 through a port 23, and seated in thewall surrounding said chamber 18 'andi preferably at a point directlyopposite this port 23, is a spark lug 24, the operation of which iscontrolle by a suitable timing apparatus (not shown).

Formed integral with or fixed to the cylindrical walls 15B that inclosethe upper portions' o the chambers 18 and 19, is a hous- P ing 25, thechamber 26 'within which has communication with the piston valve cham-Aber 18 through a series of ports or openin s P 27 and with the selectorchamber 19 throng a series of ports oropenings 28. Formed through thewall of the cylinder block, immediately below the chamber 26 and leadingoutwardly from the selector chamber 19, is an inlet port 29 and formedthrough said wall at points a short distance below this inlet port A29,is an auxiliary loutlet port 30.

Formed through the wall of the cylinder block, a short distance belowthis auxiliary exhaust port 30, is lan auxiliary inlet port lectorchamber 19 and the intermediate portion ot the piston chamber 16, is acombined anxiliary'inlet and exhaust port 32, the same occupying ahorizontal plane between the ports 30 and 31.

Arranged for reeiprocatory movement within chamber 18 is a piston valvethat comprises a' cylindrical stem portion 33, an upper cup-shaped head34, a lower hollow cylindrical head 35, and a skirt portion 36' thatdepends from said lower head. The lower portion of this cylindricalvalve is connected, by a suitable rod 37, to one of the cranks of shaft12.

Formed through the stem 33 of this piston valve is an axially disposedbore orpassageway 38 that establishes communication between the chamberswithin cu -shapcd head 34 and the hollow cylindrica head 35 andconsequently permitting oil to flow' freely from the upper to the lowerchamber.

F n'1ned,through the annular wall of the cylindrical head 35,immediately1 above the' bottom thereof, are 'downwardly andyoutwardlyinclined oil ducts 39 which-provide means for delivering liquidlubricant .onto

' the surface-ofthe lower portion of reciprocating piston chamber 18,and,l to-insure derectly beneath the loweil or discharge end of duct orpassageway 38'.

Formed through the bottom of the lower vhead 35 isan axially disposedduct 41 that rovides means for permitting liquid lubrinected'. f l I Theu perfend of chamber 18 is closed by ya suitab Y,plug or cap 42 andleading thereto, froml a source of supply, is a liquid lubri cant pipeor .conduit 43.

The, annular chamber. .44, between the heads 34 'and`35 and surroundingthe stem 33, is alwaysin communication with the main inlet l ber 17, anV,during the reci rocationv of the ports27 thatlgprovide communicationbe- `tween chamber, 26.an d the upperportion .of

iston chamber 1 8.- -l

Arranged vfor reciprocatory movement within the hamber 19 is asubstantially hollow cylindricalmember 45' that vperforms thefunctionsof afselectorand which cooperatesl with the reciprocating`piston in controlling the ingress of gaseousfuel into the combustion,chamber offthe engine and the subsequentgeessofthe burnt gases androducts of' ustion therefrom, andthe ower portion of saidvselectorv isconnected, by 'a rod 46, to a crank 47 on crank shaft 12 and which crankis arranged at an angle of approximately with respect to the-crank towhich connecting'rod 37 is connected.

Formed through the lower portion of this 4cylindrical selector, is aninclined port or passageway .48. that is adapted t establishcommunication between the ports 31 and 32, and formed through the wallofthe selector above this port 48, are oppositel arranged ports 49 and 50that occupy di erent horizontal planes and'which are adapted tocoinciderespectively, with the ports 32 and 30. Arranged within selector 45,above port 50, are horizontally disposed partitions 51 and formedthrough the wall of said selector, immediately above the upper one ofsaid partitions, is a port 52'that is adapted to register with port 294at a certain period in the reciprocation of said selector.

Formed in the upper portion of the selectoi' arehorizontally disposedpartions 53 and formed through the wall of said selector, immediatelybelow the lowermost of these partitions, is a series of ports 54 thatare adapted to coincide with the-ports 28.

Formed through the'wall .of the selector,

istonvalvethe upper hea 35 controls thel rt 23 land the combustionchaminoA '1,504,096l v a immediately'above the upper one of the par;V

ltitio'ns 53, is a series of ports 55 that are adapted tocoincide Iwithports ,28 when the selector is drawn downwardlyto its limit ofmovement.. f

The'distance between ,the portsil and 55 is approximately equal to, orslightly greater than, the,v height ofi lthe po'rts28; conseterni lateposition, as illustrated in Fig.

' 2, the' pass ge of' burnt gases or prodlxcts 'of combustion .throughtheports 28 4is out off.

' The 'crank'ishafts -1 1an d12 aresct .or 0- ,sitionedwth' respect ,toeach othelfa S0. t at.

" compression ,stroke` and the charge ot; gaseous -fuel drawn into thecombustion chamber is' under highest-compression, the piston valve andthe'selector -occupy the positions 2o.

as illustrated in Figs. L 2 and 5, and when sopositioned the selectorie' moving downstroke vand the-'pistonr valve is 'l 1e,. ;inning'itsAward on the .latter halofl its downward upward `stroke. i g

The charge of 'eeous fuel drawn into the combustion chamber onV theprevious suction stroke of the ieton, is compressed inthe I' fcombn'stioncha'm `r" 17,1nd annular cham- .ns weeserpkas:

ber-144 iabout the stem of the piston. valve,

and-fsaidclia'rge iaignited as "result of a ark lproduced fbe'tween. the'terminals 'of t espark plu 24jbythetimingmp aratus Vassociatedwit.,theengn 'vendas-.t e\ga s ecus chargefisthus ite ,fits y'force isexfpended tomove .1 the 'puttin- 21 -downward `on s thepiston 21''rtelto move dwnward on its ,power stroke,- .selector is drawn downward,by .its crank-'and connecting, rod, at half the-speed of movement ofsaid piston,

andsuch'downward .movement of the selector`gradually lningeV ports 49 1and 5 0 into full re tration with', rts 32.. and 30 respective y,.1fl`oAthat'` w en..r piston 21 has reached xtslowerflimitof movement on thepower stroke, ports'32 and-49and 50 and-30 are in fullreglstration -witheachother, and the ports in the upper end of lsaid selector are 1n full'stratlon with exhaust cham- .fber- 26 throng Thus, when t ezupper faceof the piston 21 passes the upper ed .oport 32,' andv during themovementfo the upper face of said-piston downward to the lower edgeofsaid port,a considerable portion of the produets of combustion abovesaid piston are 'perf mitted to discharge through' coinciding ports 32and 49 and ports 50 and 30, thereby efecting a-material reduction ordrop of .pressune wzthinthe combustion'chamber, and on the succeedingupward oriexha'ust stroke of piston '21, the remaining products ofcomustidhv will be forced out,th'rough port 23,.

into the annular chamber 44 i-n the piston valve, and from thencethechamber 26, with v which'annnlar chamber 44 is in communica-A tion byreason of the fact '.jthal. said piston has moved upward. until thelower-end ofl bead Ill-fully vuncovers ports 27. nnd,"fron'i saidchamber 26. the products of combustion will exhaust through ports 55that are in register with portsQS. and. said products fof eombustionlwill* finallvdlscharge through fthe upper portion of the selectorchamber 19.

During. the upward movement of the piston 21 onits exhaust. stroke, theselector is being' moved upwardly through vthe' first half 'of itsupward movement, thereby gradually moving exhaust ports 55 out ofregistration .with ports 28, so that when piston 21 reaches .its upperlimit of movement, orhigh center, the .exhaust fully. closed.- Y Avllhen piston Qlreaches its high center at the end' of its exhauststroke, the upper edge' of port '52l is brought into registraportsjustmentioned will be tionwith the lower edge of main-inlet port 29. andas the selector continues to move upwardly 'simultaneously vwith thedownw'ard or suction. movement of piston 21, the inlet opening` for'gaseousuel drawn into the engine .through ports 29 'and 52 gradually`Increases in 'size proportionate with the downward/movement of piston21, and v the chargeofigiaseous fuel thus drawn'v into the chamberwithinthe selector Awith which port 52 communicates, will be drawn,`

through registering-'ports .54 land 28, intochamber 26, from thence,throughports 27,

' into annu-lar'chamberl of the piston valve,

which latter was elevated during the-power and exhaust strokes ofthepiston 21 and and piston valve in these positions, port 48 will be infull registration with auxiliary inlet ports -31- andv 32. therebyadmitting additional gaseous fuel to the vcombustion chamber oftheengine during the finall por tion of the'downward travel of piston 21and consequently .insuring the lillng of the combustion. chamberwith ain aximum- 'combustible charge. As piston 21 moves upward o" '.,itssuclas ceeding or compression* stroke, 'charge of gaseous fuelpreviously drawninto the combustion chamber will be compressed thereinand in the annular chamber 4A, which is always in communication with thecombustion chamber 17 through port 23, and, when piston 2l has completedits compression stroke and is at 4its high center, the selector 45 andthe piston valve will occupy the position as illustrated in Figs: l and2, said piston valve4 being at its lower'limit of movement andthe-.selector at a half-'way point in its downward movement. 1

At the point of -highest compression, or immediately thereafter,. thetiming appa-` ratus associated with the engine produces a spark between'the terminals of plug 24, thereby igniting the gaseous fuel within thecombustion chamberand consequently forcstroke.

ing the piston 2l During the operation of the engine, the externalsurfa'ceofthe `lower portion of the pistonv valve will be effectivelylubricated'l y oil that discharges 4downwardly through duct 38 and outthrough ducts 39, and the wristpin that connects rod 37 to' the skirtortion 36 of' said valve, will bia/lubricated y oil that drops ontosaid: wristpinfrom outletaperture 41h 1^ The selector and toelectuallycontrol the .admission-oftfuel chamber, and, by

' haust stroke of the piston'21. a Y

valve and selector are arf, ranged side by side in chambers .that are'of uniform diameter throughout their lengths thereby providing arelatively simple an gases into engine, and likewise the exhaustof'prod-l ucts of combustion from 'saidloombustion auxiliary inlet anexhaust ports,'.gase0us fuel isadmitted to both ends .of the .combustionchamber, thereby insuring the com plete filling of saidv chamber with.combustible charges and also insuring thecomplete; elimina-tion ordischarge .of all .burnt and products of combustion during 'thev4 Thepiston with gaseous fuel, even at high s eeds, andi' consequentlyeffecting a materia increase in elliciency of the engine.

The inlet of gaseous fuel through the auxiliary inlc-t ports providesfor a cooling effect on the piston'and the cylinder v valls immediatelyadjacent to the-auxiliary mlet ports. thereby materially reducing thetmdownward on its` powerV piston valve co'operate the combustion"chamber of the roviding the main. and

' said.l

l' '2 The combination withan internal coml bastion engine ".-fhaving' "aprimary inletl and that may beeasily produced and enabling.

'and bustionv chamber, and means for actuating Asaid piston valve andselector 1n proper time relation to the'movements of thepston ofperature in said walls and piston head and eliminating `the blistering,and warping of said head and walls.

All of the movingv partel ofthe enginethat are subjected-to the ighestde oheat resulting from. the continu explosions 4within -the combustionchamber, are arranged sothat they reciprocate or travel overwater-cooled surfaces, and asl a result, the heat is constantlydisseminated-therebypre venting warpingand blistering of said arts.,

The arranleinen'to'f` selector and va ve in my imp rov e'n` ine givesgreat flexibility and maximum e cienc at ln h speed without thexiecessit for t `e"\`1's w lead and lag timing, whic l 1" is ladetriment'- even on slow speed en es.;

'It will readily understood that,I minor l' changesin the size, form-andconstruction of the various parts of 1ny` 'improv d internalcombiistionengnemay be madeand' substituted for those 'herein' shownandde'scribed without-depart'1lg-fr0xnthe spirit of my invention, thescor yof."yvhichis set forth inthe appended caims.' A,Iclaimaslmy-inyention: v 1

ary inlet and "ex haust port,"of -a pistonvalve and"selector4 arrangedlj for "operation adjacent to" 'each primary inlet and .l

.other and adaptedjtocoopefrate in coritr'ol- 'ling' the admssonof iisfuel through ports into' the 'combustion chamber l of the enginefga'ndthedischarge of burnt gases 'exhaust port and'fa'. ary. inlet andexhaust port, of a'pistonvalve and selector arranged for operationadjacent. to Aeach to -cooperate in control# other and adapted ling'theadmissionof gaseous fuel through saidv orts into the combustion chamberof the engine and the discharge of burnt gases roducts 'of combustionfrom said com- '3. The combination with an internal combustionengine-having 'a primary inlet and. exhaust port and a secon ary inletandexhaust port, of-a piston valve and selector arrangedfo'r :operationadjacent to each other and adapted to cooperate in controlmbustion fromsaid comllO liigv the vadmission of gaseous f uel 'through saidl portsinto the combustion chamber of the engine andy the discharge ofburntgases and products oicgmbustionufromsaid combastion chamber;q andmeans for actuating said piston valve and selector in proper timerelation to each /other and to the'movemen of the piston'of the engine.

reciprocatory operation adjacent to each 'eating' mem other for'vcontrolling thel admission of gaseous fuelthrough said rtv into thecomustion chamber, and the ischarge; of burnt -gases 'and products ofcombustion from sa'id of gaseous fuel and lhurnt pro ucts of comcombustionchamber.v .a y

5. The combination with' an internal com.- bustion'engine" havingcombined inlet and exhaust arranged adjacent to; the ends ofthecombustion chamber of the engine,

"reciprocating members adapted to cooperate in controlling the admissionof us fuel and burnt products of combustion through one of'said and oneof which reciprors controls the admission of gaseous fuel. and thedischar of burnt products ofcombustion' throng the other 6.Thec'ombination with an internalcombustion Aengine havin combined inletand exhaust ports'arrange adjacent to the ends,

ofthe combustion chambero the engine,-

reci'procating members adapted'to cooperate'm controlling the admissionVof ous -ciprocati'ng members controls thev admis sion of-gaseous -fuelard the discha e of burntpro'ducts vof,c' i`xri`l.ustioz 1 throng =,theotherl port? andvmeans for actuating said reciprocating members inproper time relation to each other land to the 'pieton of the enu'e'.-.f

.i An internal combustion engine having a combusitionxfchamber,- apiston operating therein,combined inlet and exhaust ports arrangedadjacent to .the endsof said combustion chamber, and means including apiston valve'and aselector for admitting gaseous f uel through saidports at both ends of .the suction stroke of the iston and forpermitting-the discharge of urnt productsl lif combustion from saidcombustion cha'mtill ber at both ends of the exhaust strokel of thepiston.

' 8, Anyinternalcombustion engine having a combustionvchamberand apiston operating therein, means for admitting gaseous y Aandfparallelwith the combustion' chamber,

roducts of; com stion' through one iofsai ports, one of whichlrechambers there being combined inlet and exhaust ports arranged in thecylinder block adjacent t'o the ends of the combustion chamber therein,aiiston valv'e arranged for operation in 'one o the elongated chambersand Aa selector arranged vfor, operation 4inthe' other elon-Ava'tedchambers, which pistonjvalve and seector cooperate' in controllinthe passage bustion'through said combined inlet and ex- .hause ns. r v

-#10.v nan-internal combustionengine, a3'

`cilinder block provided with a combustion c am ber. a piston arrangedlfor o therein, clon ration ted "cylindricalf c ambersso portas .bertherein, a'jpiston valve arranged for operation in one of the elongatedchambers, a selector arranged for operation' inthe other elongatedchambers, which piston valve and selector cooperate inxcontrolling thePlena@4 nets o f combustionv through said com inlet and exhaust po atingsaid proper time 'relation to' eachother.

of gaseousfuel and burnt rqd.

rranged' in the c linder block ad'af f Acent to the endsofftlieycombustion chain-' and means for Piston v' ve' andselectores-in.' '95 amber, a piston arranged for o therein,l elongated.cylindrical c ambers formed in i block dimmi when the endsggf thecombustion chamber therein, a pistxignvalvearrsnged forv operation inone .offlip elongated chambers, ajselector arranged "for operation inthe' .otherelom gated bhamber, which piston valve and seectorcooperatein controlling the pgsggge A.nor-- bust'ionthrough said combined inletand ex'- .of gaseous fuel and burnt products of comhaust ports, andmeans for actuating said piston'valve and selector in proper timerelation to each other and to the piston"l A 1.15 I 12.-In an internalcombustion en e, a

of the engine.

cylinder block provided with a com ustion chamber, a piston arrangedfor' operation therein, elon ated cylindrical chambers formed in saiblock adjacent to each other lition-"A ai and parallel with thecombustion chamber, g

there being combined inlet and exhaust ports f arrangedm thecylinderblock adjacent -to-` and parallel with the combustion chamber,there being combined inlet and exhaust 'ports arranged in the cylinderblock adja-- cent to the ends of the-combustion chamber therein, apiston valve arranged for. operation in one `of ,the elongated'chambers. a

selector arranged foroperation in the otherA elongated chamber,whichpiston valve and selector cooperate in controlling the passage ofgaseous fuel and burnt products of combustion throu "h sani ombiiidinlet and exhaust ports,y and therebeing .fluid cooling o mediumchambers .orrxledinfthefwall.l

the )cylinder block around 13. An internal combustion engine havin aVcombustion chamber anda piston arrange, for operation therein', thereing combined inlet and exhaust portsformed-m the vvallof the enginecylinder adjacent to thegends of the combustion chamber, .oa-selector`for. controlling the passage of gaseous fuel-andproducts of vcombustionthrough said ,.com-,

i the passage of for operation therein, there y inlet and exhaust :portsformed-4m.the-.WallffV of the engine cylinder adjacent eto .fthe-ends;Aof the combustion chamber, a' selector forI controlling the passage of'gaseous `fue1'; andv products -of kcombustion through saidfcom-f-valve-v cooperating witli slid' -vsele'ctorfory controlling the passageof gaseousffueljand burnt products of 'combustion` through one ofsaidports. .y .Y 14.` An internal combustion A.engine having acombustion chamber and a pston arranged bined inlet and-exhaust ports, apiston'valv'e cooperating with said selector.; for controlling aseousfuelandburntgprodf ucts of combustion through one `of .said ports,I

Iand means foractuating said: selector and piston vvalve in propertime'relationto yeachj other and to the piston of the enginem f 15. Thecombination y with lan interna combustion'l engine having'a-"-combu.stionV chamber and a piston operating therein, of cooperatingmeansfor control ing the admission of gaseous fuel to the upper end of'the combustion chamber, the discharge of burnt products of combustionfrom the combustion chamber on'the exhaust strokefof the piston, theadmission of gaseous fuel to the lower portion of the combustion chamberat the end of the suction .'stroke ofthe piston and the discharge ofburnt products of combustion from the combustion chamber,

at the end of the power stroke of the piston.

16. The combination with van internal combustion engine having acombustion chamber and a piston operating therein, of cooperating meansfor controlling the admimion of gaseous fuelvto the upper end of saidcombustion chamber and Vsaid elongated chambersg combined inletandexhaust port lead'n said elongated chambers into t e upper porthecombustion chamber, the discharge of burnt products of combustion fromthe com-` bustionI chamber on the exhaust stroke of the-piston, thezadmissionof gaseous fuel to the. lower portion of the combustion chamvber at th 'a. end-of the suctionstroke of the -pistonpand the dischargeof .burnt products 'of ,combustion `from the combustion chamber at theend'of the power stroke of the piston, and-means for actuating saidcooperating means ;inzfproper `time relation to the movements l'of thevVpiston of the engine.

. .,17.1In auf-internal combustionlengine, a c lindenblock provided witha combustion c ambenanda pair, of elongated chambers ,arra ed side; bys1de-and adjacent to said combustion chamber, there'being a combinedinlet andf-vexhaustlport leading -from one of tion of the combustionchamber, there being a-combined inlet and exhaust port leading fromthe'other one of said elongated chambers into'the lower portion of the'combustion chamber, cooperating members arran ed for reciprocatingmovement within sai elon- 'gated chambers for controllinr the passage ofgaseousfuel and burnt products of combustion through said combined inletand exhaust ports, and means for actuating said.saidfelongatedchambersinto the upper por.- v

ambers for `controlling the cooperating members in proper time relationy to each other and to the movements of the piston of theA engine.'

Intestimony whereof I have'si'gned my ecication.

name .to this RETT R. BURTNETT.

